4 * Copyright (c) 2006 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License version 2 as published by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "qemu-timer.h"
30 /* i82731AB (PIIX4) compatible power management function */
31 #define PM_FREQ 3579545
33 #define ACPI_DBG_IO_ADDR 0xb044
35 typedef struct PIIX4PMState {
43 int64_t tmr_overflow_time;
56 #define RTC_EN (1 << 10)
57 #define PWRBTN_EN (1 << 8)
58 #define GBL_EN (1 << 5)
59 #define TMROF_EN (1 << 0)
61 #define SCI_EN (1 << 0)
63 #define SUS_EN (1 << 13)
65 #define ACPI_ENABLE 0xf1
66 #define ACPI_DISABLE 0xf0
68 #define SMBHSTSTS 0x00
69 #define SMBHSTCNT 0x02
70 #define SMBHSTCMD 0x03
71 #define SMBHSTADD 0x04
72 #define SMBHSTDAT0 0x05
73 #define SMBHSTDAT1 0x06
74 #define SMBBLKDAT 0x07
76 static PIIX4PMState *pm_state;
78 static uint32_t get_pmtmr(PIIX4PMState *s)
81 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
85 static int get_pmsts(PIIX4PMState *s)
90 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
91 if (d >= s->tmr_overflow_time)
96 static void pm_update_sci(PIIX4PMState *s)
101 pmsts = get_pmsts(s);
102 sci_level = (((pmsts & s->pmen) &
103 (RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0);
104 qemu_set_irq(s->irq, sci_level);
105 /* schedule a timer interruption if needed */
106 if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) {
107 expire_time = muldiv64(s->tmr_overflow_time, ticks_per_sec, PM_FREQ);
108 qemu_mod_timer(s->tmr_timer, expire_time);
110 qemu_del_timer(s->tmr_timer);
114 static void pm_tmr_timer(void *opaque)
116 PIIX4PMState *s = opaque;
120 static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
122 PIIX4PMState *s = opaque;
129 pmsts = get_pmsts(s);
130 if (pmsts & val & TMROF_EN) {
131 /* if TMRSTS is reset, then compute the new overflow time */
132 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
133 s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
146 s->pmcntrl = val & ~(SUS_EN);
148 /* change suspend type */
149 sus_typ = (val >> 10) & 7;
151 case 0: /* soft power off */
152 qemu_system_shutdown_request();
164 printf("PM writew port=0x%04x val=0x%04x\n", addr, val);
168 static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
170 PIIX4PMState *s = opaque;
189 printf("PM readw port=0x%04x val=0x%04x\n", addr, val);
194 static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
196 // PIIX4PMState *s = opaque;
199 printf("PM writel port=0x%04x val=0x%08x\n", addr, val);
203 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
205 PIIX4PMState *s = opaque;
218 printf("PM readl port=0x%04x val=0x%08x\n", addr, val);
223 static void pm_smi_writeb(void *opaque, uint32_t addr, uint32_t val)
225 PIIX4PMState *s = opaque;
228 printf("pm_smi_writeb addr=0x%x val=0x%02x\n", addr, val);
233 /* ACPI specs 3.0, 4.7.2.5 */
234 if (val == ACPI_ENABLE) {
235 s->pmcntrl |= SCI_EN;
236 } else if (val == ACPI_DISABLE) {
237 s->pmcntrl &= ~SCI_EN;
240 if (s->dev.config[0x5b] & (1 << 1)) {
241 cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
248 static uint32_t pm_smi_readb(void *opaque, uint32_t addr)
250 PIIX4PMState *s = opaque;
260 printf("pm_smi_readb addr=0x%x val=0x%02x\n", addr, val);
265 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
268 printf("ACPI: DBG: 0x%08x\n", val);
272 static void smb_transaction(PIIX4PMState *s)
274 uint8_t prot = (s->smb_ctl >> 2) & 0x07;
275 uint8_t read = s->smb_addr & 0x01;
276 uint8_t cmd = s->smb_cmd;
277 uint8_t addr = s->smb_addr >> 1;
278 i2c_bus *bus = s->smbus;
281 printf("SMBus trans addr=0x%02x prot=0x%02x\n", addr, prot);
285 smbus_quick_command(bus, addr, read);
289 s->smb_data0 = smbus_receive_byte(bus, addr);
291 smbus_send_byte(bus, addr, cmd);
296 s->smb_data0 = smbus_read_byte(bus, addr, cmd);
298 smbus_write_byte(bus, addr, cmd, s->smb_data0);
304 val = smbus_read_word(bus, addr, cmd);
306 s->smb_data1 = val >> 8;
308 smbus_write_word(bus, addr, cmd, (s->smb_data1 << 8) | s->smb_data0);
313 s->smb_data0 = smbus_read_block(bus, addr, cmd, s->smb_data);
315 smbus_write_block(bus, addr, cmd, s->smb_data, s->smb_data0);
327 static void smb_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
329 PIIX4PMState *s = opaque;
332 printf("SMB writeb port=0x%04x val=0x%02x\n", addr, val);
357 s->smb_data[s->smb_index++] = val;
358 if (s->smb_index > 31)
366 static uint32_t smb_ioport_readb(void *opaque, uint32_t addr)
368 PIIX4PMState *s = opaque;
378 val = s->smb_ctl & 0x1f;
393 val = s->smb_data[s->smb_index++];
394 if (s->smb_index > 31)
402 printf("SMB readb port=0x%04x val=0x%02x\n", addr, val);
407 static void pm_io_space_update(PIIX4PMState *s)
411 if (s->dev.config[0x80] & 1) {
412 pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
413 pm_io_base &= 0xffc0;
415 /* XXX: need to improve memory and ioport allocation */
417 printf("PM: mapping to 0x%x\n", pm_io_base);
419 register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
420 register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
421 register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
422 register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
426 static void pm_write_config(PCIDevice *d,
427 uint32_t address, uint32_t val, int len)
429 pci_default_write_config(d, address, val, len);
431 pm_io_space_update((PIIX4PMState *)d);
434 static void pm_save(QEMUFile* f,void *opaque)
436 PIIX4PMState *s = opaque;
438 pci_device_save(&s->dev, f);
440 qemu_put_be16s(f, &s->pmsts);
441 qemu_put_be16s(f, &s->pmen);
442 qemu_put_be16s(f, &s->pmcntrl);
443 qemu_put_8s(f, &s->apmc);
444 qemu_put_8s(f, &s->apms);
445 qemu_put_timer(f, s->tmr_timer);
446 qemu_put_be64(f, s->tmr_overflow_time);
449 static int pm_load(QEMUFile* f,void* opaque,int version_id)
451 PIIX4PMState *s = opaque;
457 ret = pci_device_load(&s->dev, f);
461 qemu_get_be16s(f, &s->pmsts);
462 qemu_get_be16s(f, &s->pmen);
463 qemu_get_be16s(f, &s->pmcntrl);
464 qemu_get_8s(f, &s->apmc);
465 qemu_get_8s(f, &s->apms);
466 qemu_get_timer(f, s->tmr_timer);
467 s->tmr_overflow_time=qemu_get_be64(f);
469 pm_io_space_update(s);
474 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
480 s = (PIIX4PMState *)pci_register_device(bus,
481 "PM", sizeof(PIIX4PMState),
482 devfn, NULL, pm_write_config);
484 pci_conf = s->dev.config;
485 pci_conf[0x00] = 0x86;
486 pci_conf[0x01] = 0x80;
487 pci_conf[0x02] = 0x13;
488 pci_conf[0x03] = 0x71;
489 pci_conf[0x06] = 0x80;
490 pci_conf[0x07] = 0x02;
491 pci_conf[0x08] = 0x03; // revision number
492 pci_conf[0x09] = 0x00;
493 pci_conf[0x0a] = 0x80; // other bridge device
494 pci_conf[0x0b] = 0x06; // bridge device
495 pci_conf[0x0e] = 0x00; // header_type
496 pci_conf[0x3d] = 0x01; // interrupt pin 1
498 pci_conf[0x40] = 0x01; /* PM io base read only bit */
500 register_ioport_write(0xb2, 2, 1, pm_smi_writeb, s);
501 register_ioport_read(0xb2, 2, 1, pm_smi_readb, s);
503 register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
506 /* Mark SMM as already inited to prevent SMM from running. KVM does not
507 * support SMM mode. */
508 pci_conf[0x5B] = 0x02;
511 /* XXX: which specification is used ? The i82731AB has different
513 pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
514 pci_conf[0x63] = 0x60;
515 pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
516 (serial_hds[1] != NULL ? 0x90 : 0);
518 pci_conf[0x90] = smb_io_base | 1;
519 pci_conf[0x91] = smb_io_base >> 8;
520 pci_conf[0xd2] = 0x09;
521 register_ioport_write(smb_io_base, 64, 1, smb_ioport_writeb, s);
522 register_ioport_read(smb_io_base, 64, 1, smb_ioport_readb, s);
524 s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
526 register_savevm("piix4_pm", 0, 1, pm_save, pm_load, s);
528 s->smbus = i2c_init_bus();
533 #if defined(TARGET_I386)
534 void qemu_system_powerdown(void)
537 qemu_system_shutdown_request();
538 } else if (pm_state->pmen & PWRBTN_EN) {
539 pm_state->pmsts |= PWRBTN_EN;
540 pm_update_sci(pm_state);